Biology·Organisms & their environment · NSSCO 5.1
Food chains, food webs & energy flow
Narrated lesson · press play
How energy from the Sun flows through living things — producers, consumers and decomposers, food chains and webs, and why so much energy is lost that food chains are always short.
What you'll learn in this lesson
By the end you should be able to (NSSCO Biology 5.1):
- Define producer, consumer, herbivore, carnivore and decomposer
- Define food chain, food web and trophic level; construct simple food chains
- Describe how energy is transferred and lost between trophic levels
- Explain why food chains rarely have more than five trophic levels, and the efficiency of plants as food
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Miss Rachel and Mike talk through the whole topic — with the figure and working drawn live.